The correct option is A 10 + (d - 1)8
Total distance covered by autorickshaw is d km.
For the first kilometre Rs. 10 is charged.
So, for the remaining (d - 1) km autorickshaw charges Rs. 8 per kilometre.
For the rest (d - 1) km autorickshaw charges (d - 1)×8.
So, the total charge is Rs. 10 + (d - 1)8.